Introduction to basic network in cloud computing

Dynamic, flexible and flexible are the most basic characteristics of the cloud . If on demand computing and traditional network architecture and technology are also the basic platforms for building cloud computing, the traditional operating architecture can not meet the needs of such a dynamic IT business requirements. It certainly requires a new IT operational mode, which is a dynamic, on-demand service, it will be a lot of computing resources provisioning and deployment.

First, cloud computing infrastructure challenges

Traditional business structure, due to the isolation of a variety of technologies (LAN and SAN), making the data center server always provides multiple external IO interfaces: LAN interface for data computing and interaction and data access storage interface, a Some special environments such as ultra-low latency interfaces in specific HPC (high performance computing) environments. The multiple IO interfaces of a server cause multiple networks running independently in the data center environment to exist at the same time, which not only complicates data center cabling, but also heterogeneities caused by different networks and interfaces, and directly increases the operation and maintenance of additional personnel. Training management The high cost of inputs, especially the low compatibility of storage networks, makes the data center business expansion often constrained.

Due to the fact that traditional applications have exclusive use of IT resources (such as a single application exclusive server), data centers have low service densities, which makes limited physical space difficult to meet the rapid business development requirements. However, the existing systems use resources inefficiently. Moreover, in the traditional business model, due to the small scale, the business follows the on-demand planning, the enterprise application deployment process is complicated and the period is long, which is difficult to meet the flexible IT operation requirement. In this transformative operation and service model of cloud computing, the business requirements of cost, flexibility and growth on demand must be solved and the IT operation architecture must be improved and optimized. therefore:

Cloud computing services inevitably require a large-scale IT operation mode, which greatly reduces the unit construction cost of the cloud computing infrastructure and substantially reduces the unit investment cost for operation and maintenance. Through the integration of network and IO to eliminate the heterogeneous network and interface environment in the data center, the cloud computing center needs optimization and simplified wiring and network environment.

Due to its business concentration, the number of service customers far exceeds the traditional enterprise data center, leading to high-bandwidth business flow, as shown in Figure 1, Amazon released its cloud computing services in 2008, the cloud service bandwidth growth Much faster than the bandwidth growth of its web services.
In general, in order to meet the business requirements of cloud computing, the basic elements of a unified network must include: high-speed exchange, unified exchange, virtual exchange, transparent exchange.